Furnace.



No. 818,393, PATENTED APR. 17, 1906 APPLICATION FILED APR 15,19044 115 afina-gru y recting '1t-,as well along ltinus in expanded form those of the UNITED simpre rnnfr erraten. l

' winnaar e. Wiss, or AKRON, Omo, Assiettes ro THE wienv susurros courant?, or AKRON, omo, A ooaronarion or orne. l

FURNAE.

Specification of Letters Patent.

llratented April i7, 1906.

Application filed .april 15, 1904. Serial Nox 203,244,

To roti/Z whom it myaynconcern:

Be it knownthat l, WILBERT G. WISE, a citizen of the United States of America, and a resident of Akron, in the county of Summit and Stateof Ohio, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates to improvements in hot-air furnaces, and has for its object the construction of a furnace of this class peculiarly adapted for the economical burning of soft coal and lfor increasing the eiiiciency and life of the structure. It will be understood, however, that my improvements will be found of advantage in furnaces burning other varieties of fuel.

Difliculties commonly met with in the operation of hot-air furnaces are the vescape of large volumes of unconsumed gases or their combustion in inefficient portions of the furnace. This is due not alone to inadequate and improper air-supply, but to incorrect con struction of the fire-pot and radiator. bviously, if the air-supply is insufficient or improperly directed the maximum of heating effect is unobtainable even with the best of fuel. So, too,if the lire-pot and radiator have '-a more or less constricted communicating opening the combustion of the gases arising from the burning-fuel is concentrated at the center of the radiator-dome instead of along i',

the side walls of the radiator, which have a much greater expanse and are more eiiiciently positioned for radiating the heat to flowing therebetween and the inclosing casing. The dome in such instance, as well as the fire-pot, is likely to be burned out far sooner than is necessary, because of the undesirable and unealled-for amount of heat to which they are subjected and which is imperfectly conducted away in the hot-air pipes, and hence much ofthe heat is conducted away by the chimney and lost. Again, it is commonly found that to provide suiiicient heatingarea for the radiator the furnace structure must be built so high as to be unsuited for many basements and cellars. Ac-

cordin ly, to avoid these and other disadvan-` tages have emplo ed a cellular fire-pot supplying not only a arge volume of air to the fuel', so that soft coal is quickly coked, but dithe side walls of the surmounting radiator, which mereliylfr con the airv @Pola and permit the free and thorough mixing of the heated air and gases. Not only this, but the radiator is provided with flaring corrugated sides and liuted top, which increases its exposed surfaces interiorly and exteriorly, strengthens the structure, and causes eddies in the currents of heated air and gases arising from the fire-pot largely along lor adjacent to said corrugated side walls, where combustion is completed in the most effective location.

Thus the tendency to burn out the radiator- 6 ,I

dome is largely overcome by dispersing the combustion along surfaces of the side Walls where the radiation is much greater and more effective. The chinmey-pipe or exitior they products of combustion is centrally situated within and near the top ofthe radiator-dome primarily to insure the better circulation of the smoke and gases peripherally within the radiator. i

' All of the, foregoing will 'ce made more clear 7 by referring to the acclfnnpanying drawings, in which* Figure I is a vertical sectional view of the furnace vof my invention before the usual easing is placed upon it. Figs. Il and ill, drawn to a somewhat smaller scale, respectively represent a section of the :lire-pot, 'taken on .line ll ll, and a plan view of the corrugated radiator-dome.

The same character of .reference has been employed therein to indicate similarvparts of the structure.

Upon the spider-casting or base l) is mount-f ed the ashpit a of approved type. Thechambered or cellular tire-pot f rests upon the circular rim above the grate, the same hav ing numerous vertical air duets or cells c opening through slots s upon the interior of the iire-pot, which is'in the form of an inverted truncated done. Supported upon the upper rim ofthe fire-'pot is the lower section 1 of the radiator, opening upon which are the usual fuel-charging door and feed-pouch Z. in the preferred type of furnace this section yZ has a circular supporting-rim Z2 margin intov the luted or corrugated radiator-wa 1s Z3. Surmounting the whole and resting upon the lower section l is the radiator-dome r, simi-,'- larlycorrugated andof somewhat flattened t pe. -When erected for use, an ordina single or double'walled casin as desire if? from the upper side Walls of w 'ch would hej" vrco . throu h ings for the sake of clearer illustration,) would of course inclose the several parts named, except for the ash-pit and fuel-openings. Extending from the righthand por tion of the furnace' are the outer portions of which are vs own as being broken away. Positioned in the pipe p is the damper 2, and it will be readily understood that t e extension of said pipe is carried directly to the chimney-flue, while pipe p3 is intended to illustrate the left-hand portion of the well-known'- U-shaped by-pass. yUpon the. inner extension of pipe movably mounted, by means of pm p4, the renewable section p5, extendin toward the up per central portion of the ra iatordome.

k'Ihe function or cooperation of the several parts as thus united may now very readily be explained further. Itwill at once be appreciated that with the ample supply of air and above the fuel within the firepot ,o tained by means of its cellular and slotted walls such fuel as soft coal will quickly 'be coked, thus insuring a clean, steady iire. Moreover, the gases -arising therefrom and mixing with lthe air-supply Willlowu Ward and expand adjacent to the corrugated)walls of the radiator, 'Where said ases will be very completely consumed. uch combustion accordingly is seen to take` place in the mcse advantageous location for radiation to the air exterior' of the structure, since the interior air-supply is directed by the hre-pot and the peculiar conformation of the side walls in such manner as to highly heat the corrugated sides of the radiator, which have relatively a very large arca. Thus the injurious effect of combustion is minimized and the life of the furnace is rolonged. Furthermore, the draft to the c imney is taken off sli htly below the point of convergence of these expanding peripheral currents after they have been subjected to the entire expanse of the radiator walls. Hence there is'carried away merely a minimum of heat, thusmaking the furnace much more efficient with a given fuel-supply. The entering pipe p5, being thus subjected to this constant iiow of smoke and gas, its comparatively thin Walls are found to be liable to at tack thereby, particularly about the upper portion of its inner end, so I have arranged to Inake'the same readily renewable simply by removing the vpin p4 and replacing the short ipes p p3, the' section p5. In I`,'I` have generally indicated by darts or arrows the flow of heated air and gas within the fire-pot and radiator'.

I claim and desire `to secure by Letters peripherally along the side walls ofthe radia tor, and a chimney-opening or exit disposed ntelrliorly of said radiator, substantially as set ort 2. In a furnace of the class described, the combi-nation with an upwardly e expanded iire-pot having air-passages and side wall openings adapted to supplyair peripherally to and above the fuel therein, of an enlarged or expanded radiator surmounting the same, having vertically-corrugated Haring side walls adjacent to which. the combustion of the heated gases is eHected by means of the peripheral air-supply, substantially as set forth.

3. In a furnace of the class described, the combination with the iirepotf having vertical air-cells and communicating slots s within its side walls, of the upwardly flarin or expanded radiator-y continuing said irepot, along Whose side walls the air-supply is adapted to be directed, and a flue-opening or exit for the trally ofthe expanded radiator adjacent to the dome, substantially as set forth.

4; The combination in a furnace with the fire-pot f having air-ducts c and side openings s within its walls, of the radiator-section Z and its dome r carried thereon having flaring side walls continuing those of the fireot Without interruption 5 said radiator bein ormed with .expandedvertically-corrugate walls, and a chimney-opening or exit mteriorly situated within the radiator-dome, substantially as set forth.

roducts of combustion situated ceny IOC Signed at Akron this 12th day of April, l

1904, in the presence of two subscribing Witnesses.

WILBERT G. WISE.

Witnesses.

D. C. Sinernmn, LAURA K. BERG. 

